Landing, E., Benus, A.P., 1985. The Levis Formation: Passive Margin Slope Processes and Dynamic Stratigraphy in the Western Area, in: Riva, J.F. (Ed.), Field Trips Guidebook. Canadian Paleontology And Biostratigraphy Seminar, Ste. Foy, Quebec. Universite Laval Press, Quebec, pp. 1-11.